position in x direction is given as
a = 1.30
b = 1.45
now average velocity in x direction is given as
Now similarly in Y direction position is given as
here
c = 0.129
d = 1.16
now by the average speed formula
Answer:
Solutes raise the boiling point of a solvent.
Explanation:
When the solutes is non volatile and dissolved in a solvent, it lowers the vapour pressure of the solvent hence elevating the boiling point of the solvent.
Answer: 585 J
Explanation:
We can calculate the work done during segment A by using the work-energy theorem, which states that the work done is equal to the gain in kinetic energy of the object:
where Kf is the final kinetic energy and Ki the initial kinetic energy. The initial kinetic energy is zero (because the initial velocity is 0), while the final kinetic energy is
The mass is m=1.3 kg, while the final velocity is v=30 m/s, so the work done is:
To calculate the temperature of the log we need the Stefan-Boltzmann's law:
P=A*ε*σ*T⁴, where P is the power emitted by the body,
A is the total surface area of the body, in our case it is a cylinder so A=r²π*h where r is the radius of the base of the cylinder and h is the height of the cylinder,
σ is the Stefan-Boltzmann constant, T is temperature and ε is emissivity .
Here we are approximating the log to be a black body.
The area of the cylinder:
A=r²*π*h, r=d/2=0.75/2=0.375 m, where d is the diameter, h=0.18 m
A=0.07948 m²
Lets solve the equation for temperature T:
T⁴=P/(σ*ε*A) and take the 4th root to get T:
T=⁴√{P/(σ*ε*A)}=⁴√{38000/((5.67*10^-8)*1*0.07948)} = ⁴√(8.432*10^12)= 1704.06 C
So the temperature of the log is T= 1704 C